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Antennae with 14-16 segments, with basal segment about equal to combined
segments 4-6. Legs pale, with femora and tibiae usually distinctly
banded with black (Fig. 84) Euborellia (p. 45)
Cle des genres d'Anisolabididae
I. Antennes comptant de 20 it 24 segments, it segment basal plus long que les
segments 4 it 6 inclusivement. Pattes (et corps) d'un noir uniforme
(fig. 83) Anisolabis (p. 43)
Antennes comptant de 14 it 16 segments, it segment basal de longueur
approximativement egale aux segments 4 it 6 inclusivement. Pattes de
couleur pale, femurs et tibias d'habitude marques de bandes noires
(fig. 84) " Euborellia (p. 45)
Genus Anisolabis Fieber
Description. Body apterous, long, slender. Antennae about half as long
as body. Head and pronotum about equal in width; pronotum nearly square,
with posterior margin and angles evenly rounded; metanotum with posterior
margin conspicuously concave. Legs relatively short. Abdomen large, somewhat
enlarged at middle. Male forceps well-separated at base, strongly curved,
asymmetrical; right forceps (dorsal aspect) more incurved than left one
(Figs. 85, 86); female forceps short, nearly straight, symmetrical (Fig. 87),
Anisolabis maritima (Bonelli)
Figs. 83, 85-87; Map 1
Forficula maritima Bonelli in Gene, 1832:221.
Anisolabis maritima; Heifer 1963:15.
Diagnosis. Body large, shiny black or brown. Legs yellow. Found only
at or near seashores.
Description. Body large (length, male 18.0-23.5, forceps 3-4.5; female
15.5-25.0, forceps 4.5-5.4 mm), shiny black or brown. Antennae with
20-24 segments, uniformly dark. Legs pale yellow. Immatures identical in
shape and color but with fewer antennal segments, and forceps straight in
both sexes.
Range. British Columbia to California; Ontario and Quebec to Florida.
Behavior and habitats. Bennett (1904) reported watching caged
A. maritima employ their forceps to capture crickets (species unspecified),
sand fleas, and smaller earwigs. They devoured them while still holding them
with the forceps. This earwig is able to twist and bend its abdomen so that
the forceps are brought around nearly in front of the head.
Guppy (1950) found A. maritima at Departure Bay, Vancouver Island,
and observed its behavior. Adults were found in trash at the high-water level
and also well above this mark, and under the bark of logs on the shore.
Members of the species are nocturnal, remaining active until temperatures
drop to near freezing. Then they retreat to well above the high-tide mark,
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